Bedspring



Oct. 24 1944. Mouw 2,360,966

Y BED SPRING Filed April 17, 1942 2 Sheets-Sheet l INVENTOR 1717Jr'e/4 2701 5144 ATTOR A. MOUW BED SPRING 2 Sheets-Sheet 2 Filed April 17, 1942 Mfif%%/% INVENTOR Hfldrew u m I A TTORNE Y5.

Patented Oct. 24, 1944 UNITED STATES PATENT OFFICE 11 Claims.

My invention relates to spring structures, and particularly to a spring for a bed, having an all wood construction.

The entire frame structure of the bed spring is made of wood, which thereby eliminates the use of metal rails, cross members, and the like. The spring surface is built up on the frame by spring strips made of wire bent in zig-zag formation. A soft edge is formed on both sides of the spring structure by spring elements which hook over convolutions of the spring strips and are joined together at the end by a border wire which has its ends secured to the end portions of the frame.

Braces are provided interjacent the ends of the frame upon which coil springs are mounted if the structure is of maximum width for a double bed. The coil springs are preferably of greater strength in the center of the longitudinal axis of the frame and are weaker outwardly of the center. The sinuous spring strips are interconnected by links or coil springs to maintain them spaced a predetermined distance from each other and for distributing the load over the various spring strips.

Accordingly, the main objects of my invention are; to assembly the spring structure of a bed spring on a. frame which is made entirely of wood; to provide a bed spring for supporting a mattress made from wood frame elements which extend to the top of the spring surface at the-ends and construct the spring unit with a soft edge along the sides; to form a bed spring by applying a plurality of zig-zag spring strips laterally across a wood frame and form a soft edge along the sides with spring elements which are hooked over the convolutions of the zig-zag strips and which are secured together at the outer ends and attached at the end portion of the frame; to form a bed spring from a wood frame having a soft spring edge along the side and hard frame members at the ends, all of which is enclosed by padding and trim material; and in general, to form a box spring structure from a wood frame having hard edges at the end and soft edges at the sides, and which is also economical of manufacture.

Other objects and features of novelty of my invention will be either specifically pointed out or will become apparent when referring, for a better understanding of my invention, to the following description taken in conjunction with the accompanying drawings, wherein:

Figure 1 is a broken perspective view of a bed spring embodying features of my invention;

Fig. 2 is an enlarged sectional view of the structure illustrated in Fig. 1, taken on the line 2-2 thereof;

Fig. 3 is a longitudinal sectional view of a portion of the length of the structure illustrated in Fig. 1, taken on the line 3--3 thereof;

Fig. 4 is a broken plan view of a bed spring, similar to that illustrated in Fig. 1, showing a modified form of my invention; and,

Fig. 5 is an enlarged vertical sectional View of a portion of the structure illustrated in Fig. 4, taken on the line 5-5 thereof.

The bed spring of the present invention e1iminates the use of frames, cross members and the like made of metal which have been employed heretofore in bed springs. The frame embodies side rails l0 and end members ll of a greater height than the side rails. The rail members l0 are interconnected by braces l2 and elements I3 are employed for forming a continuous base surface with the cross members and the platform members 4 employed at the ends. The end members l I have a horizontally disposed plate l5 secured thereto with the top surface disposed substantially in the plane of the spring surface formed by spring elements which are applied to the side rails.

Bracing blocks l6 are secured to the platform members M for rigidly supporting the plate I 5 on the members II. A plurality of zig-zag spring strips I! are stretched across the frame and are attached to the top edge on the side rails It by suitable clips l8 having a loop in whioh'the end IQ of the spring strips are anchored. A plurality of coil springs 2| interconnect the spring strips at spaced points and connect the endmost spring strips to the end plates l5.

U-shaped spring elements 22 are hooked over the convolutions of the spring strips and extend over the rails ID. The web portion of the strips 22 are secured by clips 24 to border wires 23 at both sides of the frame. The ends of the border wires 23 are arcuately shaped at 25 to conform to the shape of the corners of the platform members l4 and are anchored by clips [8 to the end plates l5. Cords 26 are looped over the border elements 23 and are tacked or otherwise secured to the top edge of the side rails Ill. The cord permits the deflection of the border wires but limits the upward movement thereof a predetermined height above the side rails.

When the bed spring is of narrow width, as for single beds, sufficient support is provided by the 'zig-zag spring strips to permit a desired amount of deflection when occupied. When the bed spring is of greater width, such as that employed in double beds, I preferably utilize a nest of coil springs 28, as illustrated more clearly in Fig. 3, under the spring strips in the central part of the frame. The centermost springs 29 are preferably of heavier gauge wire than springs 3| at the end of the group. The endmost zig-zag spring strips 32 and 33 have no such support and provide sufficient resistance against downward deflection at this portion of the structure. Accordingly, the central part of the spring structure offers the greater resistance against deflection, while resistance decreases outwardly therefrom.

Burlap or similar material 34 is employed for covering the sides, ends, and the spring surface of the bed spring, over which a padding of cotton or similar material 35 is applied and covered by a trim material 36. The material 34 and 36 is drawn over the underside of the elements l2, l3, and I4 forming the base surface for the bed spring and is secured thereto by tacks 31. r

The resulting bed spring is open at the bottom to permit the free circulation of air therethrough and forms an exceedingly resilient support for the mattress which rests thereon. While the end edges of the top surface of the box spring have no resiliency it was found that this was not detrimental to the comfort of an occupant lying on the mattress which is supported by the bed spring.

In Figs. 4 and I have illustrated a bed spring having soft edges provided on the end as well as on the sides. 'The difference in the two structures resides in the omission of the end member II, the plate l5, and bracing blocks I6. A plurality of helical springs 40 are secured to the end platform portions M by staples 4|. The springs are of greater height than the height of the spring surface formed by the spring strips 11, as illustrated in dot and dash lines at 42. The springs are drawn downwardly to the height of the spring surface produced by the strips IT by the cord 33. The cords are tied or otherwise secured to the outer edge of the top coils at 44, and are drawn straight downwardly and secured to the base plate 14 by a staple 45 and then extended at an angle to the opposite side of the top coil and secured thereto at 46. This triangular disposition of the cord 43 relative to the top coil of the spring prevents the tilting of the spring from the horizontal position'illustrated toward the strips [1. i

The springs 2! are secured to the topcoil of the spring 48 for tying the end coil springs to the spring surface formed by the end strips 32. In this arrangement the end coils produce a soft edge to the assembly and at the same time resist any tendency to be drawn inwardly when only the central portion of the construction is deflected. When a load is applied to the end springs the springs may then deflect inwardly because of the reduction in tension in the cords 43.

The border wires 24 are extended at 41 to abut the top coils of the springs 40 and are ,joined thereto by elements such as hog rings 48 which may also be employed to connect the top coils of the springs to-each other.

What I claim is:

'1. A bed spring including a base frame made of wood having side rails and end portions, spring strips secured to said side'rails and extending springs to the adjacent spring strips, a border wire extending along and above said side rails, and means for securing said border wire to said spring strips.

2. A bed spring including a base frame made of wood having side rails and end portions, spring strips spanning the side rails of the frame and forming a spring surface thereabove, means supported on the end portions of the frame and extending to the height of said spring surface, coil springs secured to said means and spring strips, spring elements made of wire having hooked ends which extend under and over convolutions near the ends of the strips to have the projecting ends disposed above the side portions of the frame, and a border wire joining the ends of the spring elements and the supporting means.

3. A bed spring including a base frame made of wood having sides and ends, spring strips spanning the sides of said frame and secured thereto and forming a spring surface thereabove, coil springs secured to the ends of the frame and extending to said spring surface, spring elements secured to said spring strips and projecting above the frame sides to the height of said coil springs and spring surface to form soft edges, and border means interconnecting said spring elements.

4. A bed spring having a platform frame having side rails and end portions, spring strips arched across said rails and secured thereto, coil springs mounted on said end portions and secured thereto, cords securing the top coil of the springs to the platform frame, coil springs joining said first coil springs to the spring strips and for joining the strips to each other, a border wire disposed parallel to and above said side rails, and means for securing said border wire to said spring strips.

5. A bed spring having a platform frame composed of side rails and end portions, spring strips arched across said rails and secured thereto, coil springs mounted on the end portions of the platform frame, cords securing the top coil of the springs to the platform frame, coil springs joining said first coil springs to the spring strips and for joining the strips to each other, spring elements secured to said spring strips having the ends projecting above the rails, and a border wire joining said elements and the first said coil springs. I

6. A bed spring having a platform frame composed of side rails and end portions, zig-zag spring strips arched across said rails and secured thereto, coil springs mounted on the end portions of. the platform frame, means for securing the top coils of the coil springs to the zig-zag spring strips and for securing the strips to each other, spring elements secured to said strips'and extending above said side rails, and a border means interconnecting said spring elements.

7. A bed spring having a platform frame comthereacross, coil springs mounted on said end portions and extending thereabove, and addispring strips arched across said rails and secured thereto, coil springs mounted on the end portions of the platform frame, means for securing the top, coils of the coilv springs to the zig-zag spring strips and for securing the strips to each other, spring elements made of wire having hooked ends which extend under and over convolutions near the ends of said zig-zag spring strips to have the projecting ends disposed above the rails, and a border element joining the ends of the spring elements and the top coils of the coilsprings,

8. A bed spring having a platform frame composed of side rails and end portions, 'zig-zag spring strips arched across said rails and secured thereto, coil springs of a greater height than the spring strips secured across the end portions of the platform frame, cords securing the top coil of the springs to the platform frame for drawing the springs downwardly to the height of the zig-zag spring strips, wire elements forjoining the top coil of the coil spring to the adjacent zig-zag strips and the strips to each other, spring elements made of Wire having hooks which extend under and over the convolutions of said zigzag spring strips to have the projecting ends thereof disposed above the rails, and a border wire joined to the end of said spring elements and to the top coil of said coil springs,

9. A bed spring including a base frame made of wood having side rails and end portions, spring strips extendingacross and secured to said side rails forming a spring surface above said frame, coil springs secured to the end portions of the frame and extending thereabove to said spring surface, a cord connected to the top turn of each coil spring and to the frame, additional coil springs connecting said first coil springs to said spring strips, a border wire extending along and above said side rails, and means securing said border wire to said spring strips.

10. A bed spring including a base frame made of wood having side rails and end portions, spring strips spanning said side rails and secured thereto forming a spring surface thereabove, coil springs supported on the end portions of the frame and extending thereabove to said spring surface, a cord attached to each coil spring and extending downwardly to the frame and upwardly at an angle to the opposite side of the spring to provide stability thereto, additional coil springs connecting said first coil springs to said spring strips, 2. border wire extending along and above said side rails, and resilient means securing said border wire to said spring strips.

11. In a spring construction, a base frame having side rails and end portions, spring strips connected to said side rails and forming a spring surface above said frame, coil springs attached to the end portions of the frame, means connecting the coil springs to said spring strips, a cord for each of said coil springs having one end attached to the outside edge of the top turn and extended downwardly to the frame and upwardly at an angle to the inner edge of the top turn to which it is secured to provide resistance against an inward tilt to the coil springs, a border wire disposed parallel to and above said side rails, and means for supporting said border wire secured to said spring strips.

ANDREW MOUW. 

